I seem to recall a batch of hardware in one of the early clusters that had issues with repeated polling of smart data, IO would pause for a few seconds. This might explain why they are writing out a daily cron script and polling a results file instead of repeatedly polling the actual devices. On Wed, Jan 3, 2018 at 8:37 AM, Sage Weil <sage@xxxxxxxxxxxx> wrote: > On Sun, 12 Nov 2017, Lars Marowsky-Bree wrote: >> On 2017-11-10T22:36:46, Yaarit Hatuka <yaarit@xxxxxxxxx> wrote: >> >> > Many thanks! I'm very excited to join Ceph's outstanding community! >> > I'm looking forward to working on this challenging project, and I'm >> > very grateful for the opportunity to be guided by Sage. >> >> That's all excellent news! >> >> Can we discuss though if/how this belongs into ceph-osd? Given that this >> can (and is) already collected via smartmon, either via prometheus or, I >> assume, collectd as well? Does this really need to be added to the OSD >> code? > > Hi Lars, > > Yaarit is taking a look at this now and the smartmon.sh collector for > prometheus looks a bit janky: > > 1) It seems like you have to set up a cron job to write the current smart > output to a text file in a directory somewhere, and then prometheus will > scrape it when polled.[1] > > 2) smartmon.sh[2] is a shortish pile of bash that collects only a handful > of fields by parsing smartctl output. > > The second piece will hopefully improve once the JSON output mode for > smartctl is completed (that is in progress upstream in smartmontools). > But the first part seems awkward, and doesn't look like it would work out > of the box. Are you guys currently collecting SMART data? If so, how did > you automate/simplify the setup? > > Thanks! > sage > > > [1] https://github.com/prometheus/node_exporter#textfile-collector > [2] https://github.com/prometheus/node_exporter/edit/master/text_collector_examples/smartmon.sh > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
